MPEG program stream

A program stream (English: Program Stream, MPEG- PS and PS) is the name for a standardized format for transmitting audio, video and data. It is specified in MPEG- 1 Part 1, Systems (ISO / IEC 11172-1 ) and MPEG- 2 Part 1, Systems (ISO / IEC 13818-1 ). In contrast to the transport stream of the program stream for media with low bit error rate (hard disks, Video CD and DVD) is being used.

In program streams frames can ( up to 64 KB, which is enough for SDTV) are housed in a block, but they can also be divided into fixed-length blocks. Program streams have been developed especially for the storage of MPEG video; they therefore support unlike some implementations of AVI naturally B-frames. Since the use of B-frames corresponds to the order of decoding is no longer the playback, program streams can contribute to the support of the decoder both a time for decoding an image suggest ( "DTS" - "decode timestamp" ) as well as the for the Play ( PTS - " presentation timestamp" ) pretend. The time stamps are housed in the data stream at the pictures so that MPEG program streams are generally suitable for streaming.